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(No Model.)

11 t Sh t. N. SCOTT-RUSSELL. 3s s 86 1 COMBINED DOOR CHECK AND SPRING.

N0. 446,561. Patented Feb. 17, 1891.

(No Model.) 3 Sheets-Sheet N. SCOTT-RUSSELL.

COMBINED DOOR CHECK AND SPRING.

No. 446,561. Patented Fgb. 1 7.1891.

In: News wanna co, mom-Lawn msnmsruu. o. c.

3 Sheets-Sheet 3.

i ?e1. N, SCOTT-RUSSELL. 1 COMBINED DOOR CHE-0K AND SPRING. No. 446,561. Patented. Feb. 17,1891.-

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NORMAN SCOTT-RUSSELL, OF LONDON, ENGLAND.

COMBINED DOOR CHECK AND SPRING.

SPECIFICATION forming part of Letters Patent No. 446,561, dated February 17, 1891.

Application filed April 21, 1890.

To all whom it may concern.-

Be it known that I, NORMAN SCOTT-RUSSELL, a subject of the Queen of ,Great Britain, residing at 41 Coleman Street, E. 0., in the city of London, in the county of Middlesex, England, have invented a new and useful Improvement in a Combined Door Check and Spring, of which the following is a specifica- Men.

My invention relates to improvements in means for making doors self-closing, and at the same time to make the closing noiseless. I attain these objects by the mechanism illustrated in the accompanying drawings, in whicl1 Figure l is an elevation, and Fig. 2 a plan, of the apparatus; and Fig. 6 shows itin two positions, with the door closed and with it fully open, the remaining figures relating to details and to an alternative arrangement.

Similar letters refer to similar parts throughout the several views.

Referring to Figs. 1 and :2, the apparatus consists of the bracket a, attached to the top member of the fixed door-frame by screws, and carrying at its end the screw 1), which thus forms a fixed fulcrum. The bracket 0 is fixed to the door itself, near the top, and has two lugs (I, through which the pin 6' passes and forms a moving fulcrum. The bell-crank lever e is made stirrup-shaped, so as to come outside the lugs d of the bracket, and is fixed by screws onto the plate f. It is provided with a hole g,into which a pin goes and carries the rod 71, and also with a hole r1, through which one end of a spiral spring m passes, the other end being attached to the projection j, which forms part of the bracket 0. formed with two parallel arms, through which the pin c passes, and is fixed to the plate f. The other end of each arm 7t is provided with a spring Z, which tends to keep it against the door when the door is closed.

Fig. is a side View of the rod 71, and Fig. et a side view of bracket a.

Fig. 5 is a view of the top plate f of the bellows, provided with a screw n, by which the escape of air from the bellows may be regulated, as it is cut away at one side. 19 is the inlet-valve, with a spring attached, arranged in a hollow seating q. The bellows 0, which is The piece 7c is.

Serial No. B L-8,805- (No model.)

made of indiarubber or other suitable material, is fiXed at the ends to the plates f and f.

Figs. '7 and 8 show two methods of attaching it. In Fig. 7 a wire 1' is passed outside the india-rubber and is tightened,so as to hold the india-rubber in the groove. In Fig. 8 the india-rubber itself is made with a solid ring at the end, which holds the bellows firmly onto the plate f, being stretched at first so as to pass over the point s.

In Fig. 6 the dotted lines show the apparatus when the door 25 is closed. The full lines show it when the door is fully open. As the door opens, the springm is stretched, the rod it describes an are on b as a center, and the springs Z prevent the part 7.: from rising until the bellows 0 is completely expanded by the combined movements of the rod h and the pivot- (Z and lever c. It has thus become filled with air through the valve 13. If now the door the let go, the spring m will cause it to close, and when the part it strikes the door the bellows will be compressed by the movement of e, and as the air can only escape slowly through the regulatingscrew it the door will close silently.

Fig. 9 represents an alternative arrangement of Fig. (3, in which the bottom plate f of the beilows o is fixed to the door If. The top plate f has a radius-bar u attached to it, so that it describes an arc with the point e as a center. Upon f is placed a cone-shaped box 1 in which a spiral spring to is fixed and keeps the bellows normally distended, the conical box being required merely to allow more length of spring to be used. The end at of the lever c is not fixed to the plate f, as in the other views, but is formed as a foot, which the bellows strikes as the door closes. In the reverse action of opening the door the bellows expands and is followed by the foot :12 to a certain distance, after which the bellows leaves the foot and the two parts occupy the positions shown in Fig. 9. The action depends upon the same principle as set forth in the previous figures.

I am aware that prior to myinvention com bined door checks and springs have been made in which the spring has caused the door to close, while the check has depended upon the compression of air in a chamber from which it could gradually escape. I therefore do not claim such a combination, broadly; but

What I do claim, and desire to secure by Letters Patent, is-

1. The combination of the twobraekets a and 0, one fixed on the door and one on the door-framing, with the rod 7L, lever e, spiral spring m, bellows 0, lever 713, and springs l, for the purpose of closing a door silently all substantially as set forth.

2. The combination, with the bell-crank le- Ver 0, provided with a forked end pivotally attached to the door and a projecting plate at its middle part for hearing against the bellows, of the rod h,-pivotally connecting the free end of the said lever with the door-frame, the spring m, secured at one end to the free end of the said lever and at the other end to the door between the forked portion of the said lever, and the flexible bellows adapted to be compressed by the said projecting plate before the closing of the door is completely effected, substantially as set forth.

In testimony whereof I hereby affix my signature in presence of two witnesses.

NORMAN SCOTT-RUSSELL.

Witnesses:

HERBERT TURMAGE CHIZNALL, ALFRED DONNISON. 

